Jack.



W. L. WEDLAR.

JACK.

APPLlcATlON FILED ocT. 20. 1916.

. ,2&1 ,go Y Patented Oct. 2,1917.

2 SHEETS-SHEET l.

ma M; u., @4' W P MV W@ my W. L. WIDLAR.

JACK.

APPLICATION FILED ocT. 2o, 19H5.

Patented Oct. '2, 1917.

2 SHEETS-SHEET 2.

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WALTER L. WIDLAR, OF LAKEWOOD, OHIO, ASSIGNOR TO TIE-IE J'IFFY' JACKCOMPANY, OF CLEVELAND, OI-IIO, A CORPORATION: OF OHIO.

JACK. i

To aZZAwL'am t may concern.' l i Be it known that I,. VALTER L. WIDL'AR,a citizen of the `United States,` residing at Lakewood, in the county ofCuyahoga and'l State of Ohio,4 have invented a certain new and' usefulImprovement in Jacks, of which the following is a full, clear, and eXactde-V scription, reference being had to .the accompanying drawings. j

This invention relates generally to lifting jacks and more particularlyto one designed for automobile use, and the object of the invention'isto provide a cast metal jack which will be inexpensive, very light anddurable, exceedingly easy and accurate in its operations, and one whichwill permit the l'oad to be raised'or lowered step by step with ease andrapidity.

Another obj ect isto providea step by step jack in which only one springis employed anda still further Objectis to provide a jack in which thelifting bar can be pulled out to its maximum height, or dropped' backinstantly,v when desired,

With 'these various objects in view the invention. consists. in thenovel features of construction and the manner of arranging the same,vall of which willbe fully described hereinafter and pointed out in theclaims.

'Infthe drawings forming a part of this specification, Figure 1 is aperspective view of a cast' metal lifting jack embody-ing one form of myinvention; Fig. 2 is Ia sectional elevation illustrating the positionsof the parts at. the start of the lifting movement; Figsf and 4 aresimilar yviews showing the position'sg'of the lparts at subsequentstages of. they lifting operation; Figs. 5, 6, 7 and 8 are similar viewsshowing, the various positions of the parts during the various stages ofthe lowering operation; Fig. 9 is a transverse .sectional view ontheline 9-9 of Fig. 2 andV Fig. 10 is a. view illustrating inperspective the lever,.pawls,cam,jshifting lever and pivot connectionall detached and sepa.- rated.. i

, In theA practical embodiment of'my inventionI employ a hollow castmetal standard 10, having a flat base 11 integral therewith;

Specificationof Letters Patent.

Patented oet. 2, wie.

Application med october 2o, 1916. 4 serial No. 126,708.

and1 working in the hollow standard 10 is the lift bar 12 having acurved head,13. The lift bar'is'provided with ratchet teeth 14 in theforward face.

The standardI -is made with a forwardly projecting housing 110a in whichis pivoted the operating lever 15 uponr the pin orl bolt 16, the outerendA of the lever being socketed or hollow to receive the wooden handle17. rIlhe inner' end' of the lever 15 is bifurcated as shown at 18' andbetween the members are pivot'ed` the working `pawl 19 and the holdingpawl- 20, the holding pawl being pivoted upon the pin or'bolt 16`whi`lethe pawl 19 is pivoted at the eXtreme inner end of the lever andtherefore has thepower communicated thereto through the lever.

One: of the members 18 hasy a circular boss 18a surrounding the. pivotopening and this circular boss serves as a pivot forthe cam plate 21which is slotted; at 22' providing a finger 23 and a head 2a and thiscam plate 2'1'also has a rectangular shaped opening 25 adjacent the endof the slot 22. A laterally projecting lug 26' is arranged adjacent thepivot opening of,I the cam plate andv in substantial alinement with saidpivot opening and the slot 22. The working pawl l19 carries a laterallyprojectingpin 27 which is v adapted towork in the slot 22, and theholding pawl 2O has a laterally projecting pin Q8 which works intherectangular shaped opening in va manner hereinafter keX- plained'.

Aj shifting lever is also pivotedlupon the boss 18a, this lever having'anotch 30 adapted to straddle the lug 26 and the inner end ofthisshifting lever is connected toxa spring 31 having a central core, theopposite end of the spring being securely fastened at 32 at the lowerend of the housing 10a.

The operation ofthe parts is as follows.

` In order to lift a load through the medium of the liftingfbar, theshifting lever 29 is thrown upwardly as shown in Figs. 1', 2, 3 and 4.#and the lever is worked Vup. and down on the pivot 16. The working pawl19k engages the ratchet face ofthe lifting bar and causes the bar to bevmoved upwardly at l desired eXtent.

l maximum elevated yposition of the handlewiththe ratchet face of thelifting bar and l hold the same while vthe working pawl is l moved outby nger 23 and carried downwardly to obtain a lower engagement with thelifting bar, and these operations are continued until the load has beenlifted to the .When it is desired to lower the load, step by step, theshifting lever 29 is thrown downwardly as indicated in Figs. 5, 6, 7 and8 and it will be understood that as the lever j 29y is movedv from oneposition to another the cam plate 21 is` also'shifted by the engagementof the lug 26 with the notched portion 80 of the shifting lever and thespring 31 r will hold the cam plate in either one of its adjustedpositions. A y

The shifting lever 29 having been thrown down, the hand lever 15 isworked down and up, being-moved down to-obtain a: grip and up to lowerthe bar with the load thereon. Fig. oillusltrates the position vj ustprior to the shifting of the load from theholding pawl 20 to the workingpawl 19, and Fig. 6 illustratesl the lowermost position of the handlever 15 wherein the load has'been shifted entirely from the holdingpawl 20 to the lowering pawl 19. The holding pawl 20 is released byvthevpull of the spring 3l just as soon as the working pawl 19 assumestheload.` Fig- 7 illustrates theposition of the parts just prior'to theshifting Aof the load from the working pawl 19 to the hold ing pawl 20,the pin 27 of the Vpawl 19 coming'ntov engagement with the finger 23 ofthe cam plate and thereby actuating the cam in a counterclock wiseVdirection against the pull of the spring 31 and permittingl the holdingpawl 20 to drop into Vengagement with the lifting bar. Fig.y 8illustrates the ver 15 wherein the holding pawl 20 has assumed theentire load andthe pawl-,19,is kicked out of the path' of the ratchetteeth by the nger 23, the cam and its finger 23 being atfall timesbiased'in a clockwise direction. The holding pawl 20 holds the liftingbar in this position while the hand lever 15 is being againl lowered tothe position shown in Figs. 5 and 6 where the working pawl 1'9-is causedto take a kfresh lowering grip, the operations being continued until thelowering of the load is complete.

It'will vthus be -s'een that I provide an eX- ceedingly strong, simpleand durable jackand one which can be jquickly and easily adjusted. forveither raising or 4lowering a vload step by step. l

It willalso be understood thaty the lifting bar, with no load thereon,can be instantly dropped. when desired by throwing down the shiftinglever and workingthe hand lever. The lifting bar can also be pulled outto itsmaximumheight at any time.4 Thus it will be seen that the jack isa quick acting one in both directions. l

f I-Iaving thus described my invention, what I claim is 1. In a deviceof the kind described,'the combination with a standard, of a liftingVmember movable therein, a lever pivoted thereto,a' holding pawlconnected to the lever pivot, a working pawl connected to the end oflever, a shiftable cam having a finger adapted to engage the workingpawl, said cam also having an openingadapted to receive a lpin carriedby the holdingu pawl, and a vspring actuatedshifting lever adaptedtoengage ysaid cam and in one position bias the holding pawl toward saidlifting meinber and in the other position bias the same in the oppositedirection.`

2. In a device of the kind described, the combination .withA a vstandard, lifting bar and lever, of a working pawl connected to the endof said lever, a holding pawl arranged upon the lever pivot, said pawlshav-l ing laterally projecting pins, a "cam arranged upon the 'leverpivot' and having an opening and a slot. adapted to receive respectivelyAthe pins of the holding and working pawls, and a spring actuatedshifting lever mounted also upon the lever pivot, said shifting leverbeing adapted to engage the cam and in' one position bias the-holdingpawl toward said liftingmember andv in the other position bias the samein the opposite direction. l 3. In a device of the kind described,thecombination of a standard, offa lifting mem. ber movable'therein, alever pivoted thereto, a holding pawl connectedto the lever` pivot, aworking pawl connected tothe end of said lever, a cam and a shiftinglever also'mount ed upon the lever'pivot, said .p'awlshaving lateralprojections adapted to engage said cam, said cam vvhaving a finger,ahead, and an'opening adjacent said head,and a slot between said fingerand head, said cam also having a lateral projection adapted toen-` gagethe shifting lever, anda spring having one end connected to saidshifting lever, the opposite end being secured to the standard. 4. In adevice of the kind described, the combination with a standard, of a.lifting member movable therein, a lever pivoted thereto, aholdingpawlconnected to thelever pivot, said' holding pawl havingthereon a laterally projecting pin, a .working pawl connected to the endof lever, a shiftingcam having a fingeradapted to engage the workingpawl,.said cam also having a lost motion connection with the pin on'said holding pawl, and a spring actuated shifting le- In testimonywhereof, I hereunto ax my ver having a 10st motion connection withsignature in the presence of tWo Witnesses. said cam, said shiftinglever being adapted in WALTER L VIDLAR one position to bias said cam andsaid holding pawl toward the lifting member and in Witnesses: l theother position to bias them in the oppo- M. F. THOMPSON, site direction.A. L. MCMANAMON.

Copies of this patent'may be obtained for ve cents each, by addressingthe Commissioner of Patente i' Washington, D. C.

